Kate Middleton, Baby Bump Debut at First Appearance Since Pregnancy Reveal!

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Kate Middleton stepped out in public on Tuesday for a good cause - and for the first time since announcing she is expecting her third child.

The Duchess of Cambridge joined husband Prince William, and brother-in-law, Prince Harry, to celebrate World Mental Health Day.

At a special Buckingham Palace reception, they honored those working in the mental health field and at their Heads Together campaign.

This initiative, headed by Kate, Harry and William, aims to reduce the stigma surrounding mental health issues in the UK and worldwide.

They did not discuss what Kate Middleton's baby gender and name, but her baby bump was ever-so-slightly visible, as you can see below!

1. Kate and William on World Mental Health Day

Kate and William on World Mental Health Day
Kate and William at an event celebrating World Mental Health Day - a cause they have long championed - on Tuesday, October 10, 2017.

2. Kate Middleton's Baby Bump

Kate Middleton's Baby Bump
Mingling at her first public event since announcing her pregnancy, Kate is beginning to show ... slightly.

3. Kate Middleton Baby Bump Sighting!

Kate Middleton Baby Bump Sighting!
Kind of, sort of! Maybe? It's hard to say but it's what we've got.

4. A Vision in Blue

A Vision in Blue
The Duchess, as always, stunned with her radiant appearance.

5. Kate at World Mental Health Day

Kate at World Mental Health Day
Kate certainly appeared to be in good spirits, having just come out of her first trimester.

6. Soon-to-Be Parents of Three

Soon-to-Be Parents of Three
Kate Middleton and William are all smiles ... they certainly have a lot of reasons to be!

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Kate Middleton Biography

Royally Pretty Girl
A celebrity gossip mainstay since at least 2006, Kate Middleton is Prince William's lady friend. These two dated off and on for many... More »
Born
Birthplace
Reading, England
Full Name
Kate Middleton